Exclude Nr=9 from (1 7) becasue Nr has to be in (3 7) or (3 9)
Exclude Nr=9 from (2 becasue Nr has to be in (3 7) or (3 9)
Exclude Nr=9 from (2 9) becasue Nr has to be in (3 7) or (3 9)
LEVEL 3 - additional horizontal Excludes =3

Exclude Nr=9 from (1 7) becasue Nr has to be in (3 7) or (3 9)
Exclude Nr=9 from (2 8 ) becasue Nr has to be in (3 7) or (3 9)
Exclude Nr=9 from (2 9) becasue Nr has to be in (3 7) or (3 9)
Exclude Nr=2 from (2 1) because of numbers= 7 9 in (2 1) (2 6)
Exclude Nr=4 from (2 1) because of numbers= 7 9 in (2 1) (2 6)
Exclude Nr=9 from (6 4) because of numbers= 3 8 that are in (5 4) and (6 4)
Exclude Nr=9 from (4 7) becasue Nr has to be in (6 7) or (6 9)
Exclude Nr=9 from (4 8 ) becasue Nr has to be in (6 7) or (6 9)